Patent US3389451A successfully refreshed from Google Patents.
US3389451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an interlocking strip structure
Assignee: Alstom Power Inc
•
Filing: 1965-12-20
•
Granted: 1968-06-25
•
Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Elio J Speca
- 👤 Lyle R Slingerland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:00
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/03; B21D39/038; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/4962; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |